Breaking News: Google Has Removed Gab's Android App from the Google Play Store
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Personally, I doubt they would, and that opens up a can of worms where:
1. The rules clearly don't apply the same to popular apps as they do to less popular ones (which admittedly also seems to be true of Google's search engine with websites in general).
2. Newer competitors to large social sites would have to be stricter on their content to get accepted onto the Google Play Store, or what not.
Feels very unfair to people running competitors to the large social media sites, since Google have proved they're willing to unfairly punish them for the exact same stuff a larger service would get away with.
Given the breakneck speed of no-platforming, I fully expect to see (within the next three months) Google's DNS to refuse to resolve sites on an ideological blacklist, and then various ISPs will follow suit. After all, "it's their own private service."